Flue-blowing apparatus



Oct. 28, v1930. B. w. KABEL 1,779,500 A FLUE BLowING APPARATUS FiledDeo. 8, 1923 4 Sheets-Sheet 1 nvewto'c W Anm.. v S 5mm* l Oct. 28,'v-1930.

` B. w. KADEI. 1,779,600

FLUE BLOWING APPARATUS Filed Dec. 8. 1923 4 Sheets-Sheet 2 40 @num/H501Oef. 28, 1930. B, w, KABEL 1,779,600

FLUE BLOWING APPARATUS Filed Dec. 8, 1925 4 Sheets-Sheet 3 vwemtoz@Heinze-t Ocfjzs, 1930. B. w. KABEL FLUE BLOWING APPARATUS 4Sheets-Sheet 4 Filed Dec. 8. 1925 68 68 gnou/H30@ @M v JML' ,GtfozmuPatented Oct. 28, 149370 BYEnsfw. KABEL, oF BALTIMORE, lirrinYLAivnV Y vFLUE-BLOWING APPARATUS `Aplnlication led December 8, 1823. Serial4 No.679,498.

The invention relates to vflue blowing apparatus, and more particularlystated, involves an improved blower and nozzle adapted for usewith'firetube boilers. j

5 One of the principal objects of the invention is to provide a iueblowing apparatus orlocomotive boilers, said apparatus including amongother things, a blower casing adapted to be fitted to the exterior ofthe I0 boiler and having mounted therein a movable nozzle designed to beprojected into and withdrawn from the fire) box of the boiler, and meansoperable .through a single actuating member forftransmitting a pluralityof 155 movements tothe nozzle, said movements including the projectionand withdrawal of the nozzle with respect to the iire box and anindependent sweepingof the tubes thereby.

Another object of the invention is to prozo vide a blower and nozzle forcleaning boiler tubes including 1n combination a casing havy ing a steamchamber and. movable nozzle therein adapted to operate as a valvemember, and means including an arm or lever forpositively controllingthe projection and with- Y drawal movements4 of the nozzle through asingle actuating member, said armor lever being located at a distancefrom the nozzle, such for example, as the cab of a locomotive, zo andsaid actuating member being designed to impart the sweeping movement tothe nozzle and being operable by means located in close proximity tosaid arm or lever.

A further object of the inventionresides 1n 515 the production of ablower nozzle :forl lue cleaning apparatus vinvolving a casing providedwith an inlet opening and a discharge nozzle portion, `the Ainterior ofsaid Acasing being shaped to provide a relatively large cavity leadingvfrom the inlet opening tofa constricted passageway forming'a throatportion, said throat Vportion servingV to more or less abruptlyintercept an expansible pressure medium, thereby causing the same vtoaccumulate within the cavity adjacent the throat portion `forsubsequentV distribution therethrough into the nozzle portion throughwhich latter the pressure medium is progressively expanded in, itsprojection from. the nozzle to the area to be treated.

PATENT opriep Astill further object of the invention to i provide ablower, nozzle adapted to'cause a steady'and uniform discharge of an;ex-v panding pressure medium such .as steam against the Vtubes to becleaned, said nozzle beingV providedwith a pronounced throat Vportionlocated between the inlet .and discharge openings of the nozzle anddisposed at an angle to the longitudinal axis of the chamber vofY thenozzle, said throat portion involving a relatively narrow elongatedpassageway of comparatively small area,.the longest dimension of saidpassagewaybeing less than both the diametergof thesubstantiallycylindrical inlet opening lotthe chamber and the longest dimension ofthe flaring nozzle portion at the point of egress ofthe rsteam wherebysaidV steam in addition toreacting against `the interior structureof thenozzle dueto its velocity, is also causedV to be ejected on theexpansion principle. in a solid-like' spray so as to operate upon'allthe tubes within theprescribed area atjsubstantially the same pressure.

Fluo blower'nozzles now in use are ,primari-ly designed to deflect thehigh velocity steam after passing into the chamber portion of thenozzle, said steam lbeing diverted through an intermediate curvedportion,v and discharged through" a flaring' nozzle portion, thistype ofnozzle operating upon thefreaction principle and showing considerablevariations in the efective working pressure of the steam over the areasubjected to the blast.` In practicethis type of nozzle acts to butpartially cleajn'the` tuzbesfthe hollowlike portions of the steamblast-opspray failing to exert sufficient pressure toV properly cleansome of the tubes. f

Figure 2 is a Vvertical sectional view through My invention has been.designed to over.- ,1

the blower casing and the associated parts as applied to the water legof a boiler.

Figure 3 is a horizontal sectional view on.

of said section being shown in elevation.

Figure 5 is an end viewlof tne controlling mechanism as mounted upon asupporting bracket suitably connected to the boileror other frame-workwithin the cab of the locomotive. y

Figure 6 is a vertical longitudinal sectional view through saidcontrolling mechanism, portions of the supporting bracket and adjustableconnections of said mechanism bcing shown in elevation.

Figure 7 is a horizontal sectional view through the controllingmechanism shown in Figure 6.

Figure 8 is a det-ail transverse vertical scctional view on the line 8MSof Figure 6, viewed in the direction of the arrows.

Figure 9 is an enlarged detail sectional View through the flexibleconnection uniting the principal actuating member with theinterconnecting link.

Figure 10 is a view in elevation of the improved nozzle viewed from thedischarge orifice side thereof.

Figure 11 is a longitudinal sectional view through the nozzle andparticularly the discharge opening and interior cavityV or chamber'communicating therewith.

Figures 12, 13 and 14 are detail transverse sectional views on therespective lines 12-12 18-13 and 14-14 of Figure 11.

Figure 15 is a view of the improved apparatus as applied to the upperportion of the water leg of the boiler at a point permitting a maximumsweep of a large area of tubes and also located within the outermost orover-all dimension of the boiler. l

Referring to the drawings in which similar reference charactersdesignate corresponding parts in the several views, I have indicated inFigure 1 but a most fragmentary portion A of the 'cab of alocomotive,and only a portion of the boilerB, the improved flue blowing apparatusbeing shown in plan view with the intermediate portion of the actuatingrod broken away. rlhe boiler is provided with the usual combustionchamber C, the fire box sheet being indicated by the numeral 1 and theouter fire box sheet by the numeral 2. In Figure l5 the usual tube sheet3 is partially shown, as are also the stray tubes 4 and mud ring 5uniting and spacing the fire boX sheets 1 and 2.

The blower portion of the apparatus comprises a body portion or casing 6provided with a chamber 7 having an inlet opening 8 suitably connectedto a source of supply of steam, air or other substance under pressureand with which the iues are to be freed from soot, cinders and otheradhering particles incident to the combustion of the fuel. Referring toFigures 2, 3 and e, the chambered portion of the casin g has an aaiallyarranged portion and an inclined communicating passageway leading fromthe inlet 8. It is desirable to make the blower body or casing of assmall over-all length possible to provide for sutiicient roadclearances. The axially arranged portion of the chamber 7 is designed toreceive a valve member 9, said Y member including a pipe or tubeprovided with a plurality of openings forming` the ports 10 which aredesigned to establish communication between the chamber 7 and thedischarge nozzle 11 included within and vtorining a part of the improvedblowing apparatus.v In the present construction the nozzle 11 to behereinafter described in detail, is shown attached to one end of thepipe or tube forming the valve member 9. The ports in the valve memberare preferably elongated and arranged peripherally of the pipe to permita maximum and uninterrupted liow of the pressure medium while the steamis turned on, the axial portion of the chamber in which the valve membermoves being formed with opposite end portions, one of which forms aclosure wall or bridge 12 for said ports when the nozzle is withdrawnfrom operative position. l/Vhen in operative position within thecombustion chamber of the boiler, the inner ends of the ports 10 of thevalve member are substantially alined or flush with the opposite end ofthe aXi al portion of the chamber, as best shown in Figure 2.

The blower casing is provided with a stuffing boX 13 through which thevalve member 9 moves, said stuffing boei 'being preferably set at anangle, as shown in Figure 4f, for the purpose of providing maximumclearance for portionsof the operating mechanism of the nozzle, and alsofor permitting the reduction of the over-all length of portions of saidoperating mechanism. The in terior of the stuffing box gland is formerwith an Oil chamber lil, an oil duct 15 coniniunicating with saidchamber for permitting the introduction of lubricating material to thepipe or steam tube constituting the valve member. The flanged portion ofthc casing'which cooperates with the stuffing box gland is preferablynotched, at 16, to permit the introduction of lubricating material whenthe gland is drawn up against the outer face of said casing flange.

The outer end of the valve member 9 is provided with a closure in theforni of a cap 17 preferably screw-tlireaded upon the pipe and beingadapted to receive a plurality of connecting means through and by meansof which the said valve member is reciproeated to effect the projectionand withdrawal there- A cfuithrelationj tctlie lire box, and in addisaid joint also permitting `the 17eCiproeatory` motion thereof. -The can1,7 isalso adapted:

to receive a yoke member 20,fo.rmed ofyoke' sections21`, each of Whichis provided'witli mi extending stud or trunnion 22 arranged to projectsubstantiallyin a horizontal planepassing through theaxisyofthe'valvemernber. The yoke sections are Iconnected together by meansofirivets 23 orother suitable fastening devices, said sections beingfitted Withiut-he annular groove or race-Way: 2,4 provided in the cap17, and united toperniit relative movement bet-Ween said cap. and yoke.This movement consists in the osc-illatoryor sweeping action of thevalve member pipe through the arm 18 While the yoke 2O remainsrelatively lined as far as any rotary movement thereof is concern-ed.V

The valve member 9 is reciprocated through the yoke connection 20, andmore especially by means of linksj25 arranged upon each side of theblower 'casing with their outer ends pivotally connectedto the studsorltrunnions 22 and their inner ends pivotally connected at 26 tomovable arms 27 of a straddlc member 28. operatively supported upon theblower casing., The links 25 are, at their outer ends, suitably retainedabout their pivotal connectijonsvvith the trun nions22 bymeans of nuts29 which 'are positioned upon the threaded extensions of the trunnionsand further securely locked there on by` means of; pins 80. The innerends Vofl thelinks 25, at their pivotal connections 2,6. with the arms27, are supported upon relatively flat headed bolts 31 and maintainednuts 32 suitably locked by pins 33 The; tlat-I i vThe straddlemember 2,8is preferably and is designed to provide a simple and corn,-y

pact actuating member through` which the; valveand nozzle areeffectively operated with a comparatively small amount of lost niontion. The casting 28 is designed to straddlea hollow boss or projecting'portiondofthe blower casing, the upperportion of each arm. 27 of "thecasting being formed With a; rela:- tively large hub section135 disposedadjacent the opposite `ends ofthe 'boss The boss adaptedto receive a.round bushing 36 said bushingbeing provided with a square opening 37through which opening, and correspondingly squared openings 38m the, huhsections 35, the squared portion 39, of ,an actuating member l0 passes.ThisY bushing forms a bearing, the wear incident to the operation ofthe. device occurring between said bushing and the opening Within thebloss 34. As a result: of this construction there is comparatively no.wear upon the. ac-

tuating rod itseltother than that occasioned by its reciprocatory actionthrough the bushing and hub sections 3,5 of the straddle cast-* ing.

The actuating member or rod 40 is designed to impart a plurality ofmotions tothe valve member and nozzle, said member constitute ing thesingle means referred toherein as controlling the several movements ofthe blower from a remote point, preferablyyin the cab of thelocomotive.` From this actuati-y ing' member both longitudinal androtary mo-v tions are imparted to the nozzle, the longitudinal orreciprocatory action ofthe nozzle being transmitted through the squaredend 39 of the rod when it is caused to rotate, and the rotary orvoscillatory motion of the nozzle is occasioned when the actuating member40 is moved longitudinally, the oscillatory Ino- "tion of the nozzlebeing transmitted through a link connection :411,1 clearly shownin`Fig-- ure l.v i i The link 41 comprises: a portion of the means foroscillating the nozzle toA effect thesweepingof the tubes When thenozzle is prof jected Within the fire box. One end of the linkconnection l1 comprises thesocket portion of the ball and socket joint'19 provided at the outer end of the' cap17 and the other end of saidlink connection is also designed to provide a socket connection for theball and socket joint 42 interposed between the, actuating member 40 andsaidy link con-neef tion 4:1. Arranged Within the link connec#` tion 4lis. a turnbuckle 43, said turn-buckle being capable of adjustment so Yasto accurately determine the zone or area to he covered by the sweepingaction of the nozzle. This Vadjustment is i particularly effective whenthe blast from the nozzle at the eX- -treme ends of the oscillatory pathof travel offthe nozzle is'improperly positionedand extends above thetube sheet or has a tendency to cut into the bedofthe fire. In thiscasethe turn-,buckle is adjusted to move the lic complementary. rods ala andfllb of the link j connection and change the oscillatory pathV of travelcovered by the nozzlef -Reversely, it will beund'erstoodthat should apositioning of the oscillatory path o-f travel of the nozzle the, otherdirection be desiredpthe turn-buckle 43 will be. adjusted in the; opposite. direction. 4 j I j To eflfecta `stil-l furtheradj-ustment. of,the

f" ber heretofore referred to.

nozzle in its sweep of the tubes and limit its path of travel, I haveprovided an adjustable stop means carried by the squared portion 39 ofthe actuating member 40, which means will be hereinafter described.

The ball and socket joint 42 by means of which one end of the linkconnection is attached to the actuating member 40, is shown in detail inFigure 9, as is also a novel con necting means between the relativelysquared portion 39 of the actuating member 40 and that portion of saidrod which extends rearwardly of the locomotive into the cab. The joint42 includes complementary socket members 44, one of which isspring-pressed against the ball 45 and the other of which isscrew-threaded into the end of the link connection and bears against theopposite side of said ball. This form of ball and socket joint providesa reliable and at the same time suliciently flexible connection topermit the translation of the respective longitudinal and rotary motionsfrom the single actuating member into the rotary and longitudinalmotions required of the no1/azie. The connection between the relativelysquared portion 39 of the actuating rod and that portion thereofdisposed within the control of the operative, comprises the pin or bolt46 provided at one end with the ball 45 and threaded at the other end toreceive the clamping nut 47 suitably locked in place by means of the pin48. Surrounding` the pin 46 is a crowned bushing 49, said bushing beingfitted within an opening 50 provided in the end of the actuating rodsection 39, the sides of said opening 50 being formed straight orparallel to permit a slight rocking action of the bushing 49 within theopening. The bushing projects slightly beyond the outer opposite facesof the end of the rod section 39 and has litted thereagainst forkedextensions or jaws 5l of a clevis 52 suitably pinned, as at 53, to therod section 54 of the general actuating mem- By this construction thedesired amount of flexibility or play is obtained and the motion fromthe rod section 54 effectively transmitted.

The means for controlling the longitudinal and rotary motions of theactuating member and more especially the rod section 54, is shown indetail in Figures 5 to 8, inclusive, and comprises la slidably androtatably mounted sleeve 55 suitably secured to the rod section 54 bymeans of pins 56 and internally threaded for a portion of its le-ngth at57. The internally threaded portion 57 receives the threaded rod 58which rod, when rotated by means ofthe hand wheel 59, causes the sleeve55 to move longitudinally. The hand wheel 59 is keyed to the outer endof the threaded rod 58. The threaded rod is provided with a flange orcollar 60 by means of which and the nut 6l the said rod is heldrelatively fixed against longitudinal movement adjacent the end wall 62of a housing 63.

The housing 63 receives the movable sleeve 55 which is fitted withinbearing portions provided in said housing so as to permit thelongitudinal sliding and rotary movements of the sleeve. A bracket 64supports the housing 63 and is preferably formed integral therewith,said bracket having a base portion 65 capable of being laterally adjusted with respect to the boiler or other frame to which said bracket isattached. In my present embodiment the bracket 64 is shown adj ustablyattached to the horizonally projecting flange 66 of a T-iron 67 by meansof bolts 68. The T-iron 67 is provided with elongated openings G9 whichare adapted to receive suitable securing bolts for rigidly attaching thesame to the boiler or other frame-work in the eab of the locomotive,said elongated openings also serving to permit vertical adjustment ofthe controlling means, as will be'understood.

The rotary or oscillatory motion of the rod section 54 of the actuatingmember is imparted thereto by means of av projecting arm or lever 70having a hand grip portion 7l and an associated latch control 72 adaptedto be aetuatcd when the hand grip 71 is clasped by the hand of theoperative. The arm or lever 70 is provided with a hub section 73 adaptedto surround the movable sleeve 55 at an intermediate gap or open portion74 provided in the housing 63. The hub section 7 3 is provided withoppositely disposed key-ways 75 adapted to receive keys 7 G which latterare designed to extend into relatively long keyways 77 provided in themovable sleeve 55 and preferably extending throughout the entire lengththereof. The keys 7 6 are retained be tween the opposite faces of thehousing provided in the gap portion thereof, as best shown in Figure 6.In this present construction of controlling means it will be seen thatany movement of the lever or arm 70 will cause the rotation of thesleeve 55 and in turn move the actuating member for reciprocating thenozzle. This oscillatory or partial rotary movement is positivelyimparted to the sleeve 55 through the key connection at any longitudinalposition of said sleeve, thereby insuring the withdrawal of the nozzlefrom the lire box as well as its projection thereinto irrespective ofwhat radial position the discharge orifice in the nozzle may occupy.,

It is desirable to limit the oscillatory movement of the lever 7 0between predetermined points, said points being arrived at according tothe throw or reciprocatory path of travel of the nozzle and valvemember. These points are indicated by the numerals 78 and 79 andcomprise depressions within the housing 68 adapted to receive the lowerend of the latch bar 80. The latch bar 8O is of comparatively simpleconstruction and is adapted to operate within an opening 8l provided inthe ing upon the boiler.

lever arm 70. A collar or flange 82 is provided on the latch bar and aspring 83 is interposed between said collar and the wall forming theclosure atv one end of the opening Sl.- The upper end of the latch barissuitably headed to receive the Vbifurcated end of an arm Se projectingfrom and movable with the hand grip of the latch 72. The foregoingconstruction of latch mechanism is economicalto manufacture, reliableinoperation and durable. The movable sleeve member 55of the controllingmeans is preferably lubricated through an oil or grease cup 85.

The location'of the improved blower, and more especially the casingV orbody portion 6' thereof, is generally effected by inserting a stay tubeor sleeve `86 between the fire box side sheet and theioutside fire boxsheet, as shown 'in Figures 2 and 3, for example. VOne end of the sleeve86 `is expanded orjbeaded over the fire box side sheet, as `at 87,andthe other end thereof'is faced off toreceive a similarly faced offannular portion `88 'provided on the portion' of the blower casingadjacent the boiler. The faced off annular portion 88 is preferablyrecessed, `and provides, together with the faced off end 86a of thesleeve 86 a tightandnon-'leakable joint. The blower casing ,ismaintained tight against theend of the sleeve'by means of the nuts89positioned Vupon the threaded ex tensions of the stud bolts 90, whichbolts serve to effectively support the blowercas- 4In lFigure'flof thedrawings there is shown anhapplication of the blower body portion'orcasing to the inwardly curved portion of a boiler `such Aas employed onthey larger types ofllocomotives and wherein it is. essential to provideample side clearance. To effect'. aconvenient installation of theboiler' apparatus one of fthe boiler stay tubes 4 is removed, andthereis inserted a tube or sleeve 91 withfits-axispreferably disposedV at anangle toithe radial'center linejwhich passed through the-removed (staybolt, said sleeve being disposed with .its .inner end rela,-A tivelyclose to one of the adjacent stay tubes and having its outer endYarranged relatively close to the adjacent stay tube located upon theopposite side of the sleeve. The

insertion of the tube or sleeve 91V in this manner provides a relativelylong recess into which the nozzleV is normally withdrawn' and protectedfrom the heat of the fire bo-x. Y The ofthe-sleeve or'tube 91lissufficient to permitY the application of the blower body-or casing tothe outer fire box sheet with the outside dimension of the blower casingand its oper-` ating means falling within the-iover-,all lat-V eraldimension of 'the boiler. With the nozzle disposed at an inclination andmovableinto the lire box at an angle which substantially bisects thearea of the tube sheet to which the blast is projected, it will beobvious that maximum efficiency is obtained from the blast in removingthe soot and other particlesfrom the tubes, and especially from theforward ends of the tubes surrounding the superheater coils of thelocomotive. In addition, it will be observed that the loca-V tionV ofthe nozzle aty an angle to the horizontal and in the upper portion ofthe water Y leg ofthe boiler causes less likelihood of the jets orblasts* of steam cutting into the fire. In all otherfrespects the blowercasing and operating mechanism are maintained the same and aV furtherdetailed description 'of this applicationrof Vmy improved flueblowing'apparatus'to the larger types oflocomotive boilers will 'not' begiven. -o

The blower nozzle ll is preferably cast and involves a casing 92 formedwith arelatively large chamberf93- The chamber 93 is provided with aninlet opening 94 of 'subi stantially cylindrical contour, said openingbeing screw-threaded Vfor attaching Y' the nozzle to the innerend of thesleeve constituting the valve member 9. The opposite ameter of the inletopeningl and the longestY dimension ofthe nozzle portion.

The walls ofthe chamber 93 are laterally flared and are preferably`designed to terminate at a point beyondthe nozzle portion, the

shape of said walls actingto abruptly inter-l cept the highvv velocitysteam immediately adjacent the throatportion whereupon itis.subsequently discharged through said'throat and permitted to uniformlyexpand through the nozzle portion toward the tube sheet of the boiler.The advantage of providingthe chamber so as to underliethe full areaofthe throat is that the formationof a relatively large cavity adjacent'the saine insures aconstant head of steamer otherpressure mediuminto'which the flowing Ahigh velocity steam rushes with the'result thatthe velocity of the steam isr'educed v'and an keffective `workingpressure built up adjacent the` constricted passageway forming thethroat so as to more uniformly deliver the steam through the nozzleportion in substantially a solid-like spray for uniform expansion andblowingV of the tubes. This construction of nozzle operates very largelyon the reaction principle, the eX- pansion developed incident to theconstant flowing of the steam being greatly subordinated to the reactionof the steam as the result of the introduction of the throat portion andthe formation of the walls of the chamber adjacent thereto with relationto the nozzle portion. In other words, because of the relatively shortlength of the fla-ring orifice or discharge nozzle portion 95 and therelation of the chamber 93 to said orifice, the reaction or reflectionof the steam or other fluid on the wall of the chamber 93 directly backof the orifice 95 has'a greater eEect in determining the satisfactorydischarge of the fluid than does the mere flowing of the steam throughthe orifice.

The discharge nozzle portion is of a narrow flaring contour, one wall 97thereof being disposed at substantially right angles to the longitudinalaxis of the chamber which it intersects and the opposite wall 98 beingarranged at an angle thereto. This discharge nozzle portion or orificeis preferably formed to permit the insertion of a plug gage whereby theorifice may be chipped and finished according to the measurements ofsaid gage. rlhis'feature is important in that the rough projectionssometimes occurring in the casting tend to set up eddies and crosscurrents within the nozzle which interfere with the uniform distributionof the steam. The blower nozzle is preferably shaped at its outer end toprovide a contracted nose portion, the

sides being suitably tapered and otherwise re# duced to prevent theclogging ofA cinders or other particles between the nozzle and sleeve86, it being obvious that should such cinders collect-in the tube theprojecting 'movement of the nozzle into the fire box will facilitate theremoval thereof.

The sweep of the nozzle, and more especially the discharge nozzleportion thereof, is determined by the position of a limiting stop member99 shown in the form of a movable block slidably positioned upon thesquared extension 39 of the actuating'member. A fixed collar 100 isprovided on said squared portion 39 and forms an abutment against whichthe sliding block 99 strikes when the actuating member is moved in thedirection ofthe arrow shown in Figure l; The block 99 contacts with theend wall of the adjacent hub section 35 provided on the blower casing asa result of this reciprocatory movement and t-he limit of travel of thelink connection 41 is thereby established, the said travel determiningthe oscillatory path of travel or sweep of the discharge orifice ragainst the tube sheet.Y For derellt plthS of travel it will be seenthat different length slide blocks can be substituted or the stop collar100 otherwise adjusted. This adj ustmcnt permits of various distances oftravel of the nozzle and is particularly effective in adapting thepresent construction of blowing apparatus to the several designs andsizes of locomotive fire boxes. The distance of the reciprocatorymovement of the nozzle into the fire box is determined by stop lugs 101projecting from opposite sides of the blower casing and adapted tointercept the inward movement of the arms 27 and the inner ends of thelinks 25 adjacent the pivotal connections 26. The outward limit oftravel is determined by the outward movement of the nozzle and moreespecially the end wall 102 thereof contacting with the end of theblower casing which extends into the sleeve 86, as best shown in Figure2. The passage of the latch bolt S0 into the depression 78 when thecontrolling lever 70 is moved, also provides a means for limiting thewithdrawal movement of the nozzle into the recess provided in the tube86.

In operation, the operative within the cab of the locomoitve, causes theprojection of the nozzle into the lire box by grasping the handle 71 ofthe lever arm 70 and rotating the same in the direction of the arrowshown in Figure 5, said movement causing the rotation of the actuatingmember 40. The squared end portion of the actuating member 4:0 rocks thestraddle casting 28 and through the link connections 25 eects the inwardmovement of the nozzle. The latch member of the controlling lever arm 70moves into the depression or notch 79 and serves to hold the nozzle inprojected position within the fire box.

lith the nozzle in projected position, the operative now rotates thehand-wheel 59 whereupon the sleeve 55 is caused to move longitudinallyand impart to the actuating member 40 longitudinal movement. Thislongitudinal movement is imparted to the link connection 41 through theflexible ball and socket connection 42, and said link connection in turnimparts said longitudinal motion to the radially projecting arm 18,v

through the ball and socket flexible connection 19. The radiallyprojecting arm 18 being provided upon the cap section 17 connected tothe end of the valve member 9, causes the longitudinal movement of thelink connection to partially rotate or Oscillate the valve member and inturn the nozzle 1l which stands projected into the fire box. Thelongitudinal movement of the actuating member 4:0 is controlled by theadjustable stop block 99 hereinbefore referred to,'and also the innerface of the end wall '62 of the housing against which the sleeve abuts.'.lhe reciprocatory or axial movement of the valve member `and nozzlewhen being proh and-wheel jected into the fire boX, causes the ports 10of casing and establish communication between the chamber 7 and thenozzle for permitting the projection of steam against the tubes. Thesteam as it passes into the relatively large cavity 93 in the nozzle isdecreased in velocity sufficiently to permit of its angular deflectionthrough the flaring discharge orifice 95 and provide for its projectionat substantially a,V uniform pressure over the predetermined area oftubes. The rotation of the hand-wheel 59 in oner direction will causethe nozzle tosweep the tubes from the uppermost groups thereof to thelowermost groups above the fire box, yand the rotation of the hand-wheelin the opposite direction willV cause the reverse action in the sweepingof the tubes. The relative size of the adjustable block 99 and positionof collar 100 determine the full sweep of the nozzle across the j tubesheet, and the turn-buckle connection in the link 4l permits of amodified path of travel of the nozzle within the maximum sweep of thetubes. j

Upon the completion of the sweeping of the tubes by the full rotation ofthe handwheel 59 in both directions the operative grasps the handle 71of the lever arm and returns the same to its initial position with thelatch engaged in the notch or depression 78. The preferred constructionof controlling mechanism positively insures the withdrawal of thenozzlefrom the lire box when this Voperation occurs irrespective ofwhether ornot the operative has failed to turn the its full' number ofrevolutions. This positive control of the nozzle in effecting itsWithdrawal from the fire box prevents the burning of the noz-V zle andother injury should it bel permitted to remain subjected to thehightemperatures of the burning fuel. ln addition,rthe posiH tivecontrol Vserves to insure the projection of the nozzle into the fireboxso that the tubes will always be subjected to the blasts j of steam. Thevalve casing may be provided with an outlet 103 adapted to provide forconnection of an automatic drain forY the chamber 7 or provide for theattachment of a drain valve. Y

An apparatusconstructed in accordance with this present invention can bereadily attached to locomotives of various sizes and types and easilycontrolled from the engineers cab. The arrangement of the several partsas shown and described provided for their economical replacement "aswell as their inexpensive initial application to the locomotive. j

I claim:

l. In a tube cleaning apparatus, the combination with a casing having achamber, of a tube movable in said chamber and provided with a nozzle atone end thereof, a plurality4 of inlet ports provided in said tube,means connected to said tube for oscillating the same, means connectedto said tube for closing the. ports from communication with saidchamber, and a single rod for operatively controlling both` of theaforesaid means.

2. -rA blower nozzle for flue cleaning devices involving a chamber.having a nozzle portion leading therefrom and being provided with aninlet opening, said chamber having laterally flaring side wallsterminating beyond the planes of the nozzle portion, a wall provided insaidnozzle Aportion the plane of which is adapted to intersect saidchamber, and a second wall arranged atan angle thereto, said nozzlehaving a restricted throat portion arranged between said chamber andnozzle portion andV disposed at an angle to the longitudinal axis of thechamber.

3. A blower nozzle for flue cleaning de-V vices involving a chamberprovided with an inlet opening and a nozzle portion leading vfrom theopposite end of the chamber-,said

chamber having laterally flaring side walls terminating beyond theplanes of the nozzle portion, a wall provided in said nozzle portion theplane of which is arranged so that if continued it would intersect thechamber,

and a second wall similarly arranged at an angle to the first mentionedwall, said nozzle having a restrictedv passageway forming a throatportion located between the aforesaid walls, where they join the chamberand disposed at an angle to the longitudinal axis thereof. l

4. A blower nozzle of the class described comprising a casing having achamber with flaring walls, one end of which is provided with an inletopening and the other end of which is shaped to form a narrow flaringnozzle portion, said nozzle having a throat portion provided in thecasing'between the chamber andnozzle portion, said throat portion beingconstricted and velongated toa longitudinal dimension which is less'thanboth the diameter of the inlet opening and the longest dimensionL of theflaring nozzle portion. V Y 5. A blower nozzle of the class describedcomprising a casing provided with a chamber having a substantiallycylindrical inlet opening and a narrow flaring nozzle portion, saidchamber having a diagonal wall provided with a constricted passagewayforming a toV throat portion between the chamber and opening and lessthan the longest dimension of vthe flaring nozzle portion.

6. A blower nozzle for flue cleaning devices involving a chamber havinga nozzle portion and an inlet opening, said chamber being provided withwalls one of which extends diagonally to the axis of the inlet openingand is formed with a constricted passageway adjacent the nozzle portion7said passageway having a throat disposed at an angle to the longitudinalaxis of the chamber, and said nozzle portion being provided withoppositely disposed outwardly flaring walls extending from theconstricted passageway for receiving and distributing an expansiblepres-' sure inediuln such as steam.

In testimony whereof I aiix my signature.

BYERS W. KABEL.

